Question

Covalent compounds are formed when electrons are $ 1 $ .
Most covalent compounds have $ 2 $ electrical conductivity.
Which words correctly complete gaps $ 1 $ and $ 2 $ ?
(A) Shared - high
(B) Shared - low
(C) Transferred – high
(D) Transferred – low

Answer 1

Hint: Chemical compounds are classified into two types based on the bond involved in the formation of that compound. Covalent compounds and ionic compounds were two types. as two electrons make a bond. Ionic compounds are formed by the transfer of electrons and covalent compounds by sharing of electrons.

Complete answer:
Chemical bonds play an important role in determining the nature of the chemical compound.
 When the bond formed between two atoms with more electronegativity difference results in the transfer of electrons with the ionic bond formation and the compounds with ionic bond were known as ionic compounds.
When the bond formed between two atoms with less electronegativity difference results in sharing of electrons with the covalent bond formation and the compounds containing an ionic bond were known as covalent compounds.
Due to the less electronegativity difference in covalent compounds, the electrical conductivity is low. The covalent compounds are inert and hence do not conduct electricity as ionic compounds.
Thus, the covalent compounds are formed by sharing electrons and the electrical conductivity is low.
Thus, the gaps $ 1 $ and $ 2 $ are shared and low.
Option B is the correct one.

Note:
Electronegativity is defined as the tendency or attraction of a shared pair of electrons towards itself. When the atoms consisting of electronegativity difference more than $ 1.5 $ results in an ionic bond, and difference less than $ 1.5 $ results in the covalent compound.